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Svet_ta [14]
3 years ago
14

According to Newton's third law, which describes what happens when a 4.5 kg pumpkin is launched from a catapult with a force of

47.5 Newtons?
A.
The pumpkin exerts a force of 43 N back against the catapult.

B.
The pumpkin exerts a force of 52 N back against the catapult.

C.
The pumpkin exerts a force of 4.5 N back against the catapult.

D.
The pumpkin exerts a force of 47.5 N back against the catapult.
Physics
1 answer:
max2010maxim [7]3 years ago
6 0
3. Law: Every action has a reaction equal in magnitude and opposite in direction.
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Answer:

\frac{dh}{dt} = 1.3 \times 10^{-3} \frac{ft}{s}, level is rising.

Explanation:

Since liquid water is a incompresible fluid, density can be eliminated of the equation of Mass Conservation, which is simplified as follows:

\dot V_{in} - \dot V_{out} = \frac{dV_{tank}}{dt}

\frac{\pi}{4}\cdot D_{in}^2 \cdot v_{in}-\frac{\pi}{4}\cdot D_{out}^2 \cdot v_{out}= \frac{\pi}{4}\cdot D_{tank}^{2} \cdot \frac{dh}{dt} \\D_{in}^2 \cdot v_{in} - D_{out}^2 \cdot v_{out} = D_{tank}^{2} \cdot \frac{dh}{dt} \\\frac{dh}{dt}  = \frac{D_{in}^2 \cdot v_{in} - D_{out}^2 \cdot v_{out}}{D_{tank}^{2}}

By replacing all known variables:

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The positive sign of the rate of change of the tank level indicates a rising behaviour.

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